# oci_execute

(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)

oci_execute — Executes a statement

### Beschreibung

oci_execute(resource `$statement`, int `$mode` = `OCI_COMMIT_ON_SUCCESS`): bool

Executes a `statement` previously returned from oci_parse().

After execution, statements like `INSERT` will have data committed to the database by default. For statements like `SELECT`, execution performs the logic of the query. Query results can subsequently be fetched in PHP with functions like oci_fetch_array().

Each parsed statement may be executed multiple times, saving the cost of re-parsing. This is commonly used for `INSERT` statements when data is bound with oci_bind_by_name().

### Parameter-Liste

`statement`

  A valid OCI statement identifier.

`mode`

  An optional second parameter can be one of the following constants:

  Execution Modes
  Constant | Description
  --- | ---
  `OCI_COMMIT_ON_SUCCESS` | Automatically commit all outstanding changes for this connection when the statement has succeeded. This is the default.
  `OCI_DESCRIBE_ONLY` | Make query meta data available to functions like oci_field_name() but do not create a result set. Any subsequent fetch call such as oci_fetch_array() will fail.
  `OCI_NO_AUTO_COMMIT` | Do not automatically commit changes.

  Using `OCI_NO_AUTO_COMMIT` mode starts or continues a transaction. Transactions are automatically rolled back when the connection is closed, or when the script ends. Explicitly call oci_commit() to commit a transaction, or oci_rollback() to abort it.

  When inserting or updating data, using transactions is recommended for relational data consistency and for performance reasons.

  If `OCI_NO_AUTO_COMMIT` mode is used for any statement including queries, and oci_commit() or oci_rollback() is not subsequently called, then OCI8 will perform a rollback at the end of the script even if no data was changed. To avoid an unnecessary rollback, many scripts do not use `OCI_NO_AUTO_COMMIT` mode for queries or PL/SQL. Be careful to ensure the appropriate transactional consistency for the application when using oci_execute() with different modes in the same script.

### Rückgabewerte

Gibt bei Erfolg `true` zurück. Bei einem Fehler wird `false` zurückgegeben.

### Beispiele

Beispiel #1 oci_execute() for queries

`<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
$stid = oci_parse($conn, 'SELECT * FROM employees');
oci_execute($stid);
echo "<table border='1'>\n";
while ($row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS)) {
echo "<tr>\n";
foreach ($row as $item) {
echo " <td>" . ($item !== null ? htmlentities($item, ENT_QUOTES) : "&nbsp;") . "</td>\n";
}
echo "</tr>\n";
}
echo "</table>\n";
?>`

Beispiel #2 oci_execute() without specifying a mode example

`<?php
// Before running, create the table:
// CREATE TABLE MYTABLE (col1 NUMBER);
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
$stid = oci_parse($conn, 'INSERT INTO mytab (col1) VALUES (123)');
oci_execute($stid); // The row is committed and immediately visible to other users
?>`

Beispiel #3 oci_execute() with `OCI_NO_AUTO_COMMIT` example

`<?php
// Before running, create the table:
// CREATE TABLE MYTABLE (col1 NUMBER);
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
$stid = oci_parse($conn, 'INSERT INTO mytab (col1) VALUES (:bv)');
oci_bind_by_name($stid, ':bv', $i, 10);
for ($i = 1; $i <= 5; ++$i) {
oci_execute($stid, OCI_NO_AUTO_COMMIT);
}
oci_commit($conn); // commits all new values: 1, 2, 3, 4, 5
?>`

Beispiel #4 oci_execute() with different commit modes example

`<?php
// Before running, create the table:
// CREATE TABLE MYTABLE (col1 NUMBER);
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
$stid = oci_parse($conn, 'INSERT INTO mytab (col1) VALUES (123)');
oci_execute($stid, OCI_NO_AUTO_COMMIT); // data not committed
$stid = oci_parse($conn, 'INSERT INTO mytab (col1) VALUES (456)');
oci_execute($stid); // commits both 123 and 456 values
?>`

Beispiel #5 oci_execute() with `OCI_DESCRIBE_ONLY` example

`<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
$stid = oci_parse($conn, 'SELECT * FROM locations');
oci_execute($s, OCI_DESCRIBE_ONLY);
for ($i = 1; $i <= oci_num_fields($stid); ++$i) {
echo oci_field_name($stid, $i) . "<br>\n";
}
?>`

### Anmerkungen

> Hinweis:

> Transactions are automatically rolled back when connections are closed, or when the script ends, whichever is soonest. Explicitly call oci_commit() to commit a transaction.

> Any call to oci_execute() that uses `OCI_COMMIT_ON_SUCCESS` mode explicitly or by default will commit any previous uncommitted transaction.

> Any Oracle DDL statement such as `CREATE` or `DROP` will automatically commit any uncommitted transaction.

> Hinweis:

> Because the oci_execute() function generally sends the statement to the database, oci_execute() can identify some statement syntax errors that the lightweight, local oci_parse() function does not.

### Siehe auch

- oci_parse() - Prepares an Oracle statement for execution

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